COMBINATION ENDORSEMENT PRACTICE TEST
QUESTIONS WITH CORRECT ANSWERS 2025
YouMareMcouplingMaMsemiMtrailerMtoMyourMtractorMbutMhaveMnotMyetMbackedMunder.MTheMtrailerMisM
atMtheMrightMheightMwhen:
A.MItMwillMbeMraisedMslightlyMwhenMtheMtractorMisMbackedMunderMit
B.MTheMkingpinMisMaboutM1M1/4MinchesMaboveMtheMfifthMwheel
C.MTheMendMofMtheMkingpinMisMevenMwithMtheMtipMofMtheMfifthMwheelM-MCORRECTMANSWER-
ItMwillMbeMraisedMslightlyMwhenMtheMtractorMisMbackedMunderMit
YouMshouldMnotMbackMaMtractorMunderMaMtrailerMuntilMtheMwholeMairMsystemMis:
A.MBetweenM60MandM80Mpsi
B.MAtMnormalMpressure
C.MBledMdownMtoMhalfMtheMmaximumMpressureM-MCORRECTMANSWER-AtMnormalMpressure
WhichMpartMofMtheMkingpinMshouldMtheMlockingMjawsMcloseMaround?
A.MTheMbase
B.MTheMshank
C.MTheMheadM-MCORRECTMANSWER-TheMshank
WhenMyouMgetMreadyMtoMbackMunderMtheMsemiMtrailerMyouMshouldMlineMup:
A.MAboutM12MdegreesMoffMtheMlineMofMtheMtrailer
B.MTheMkingpinMtoMengageMtheMdriver'sMsideMlockingMjawMfirst
, C.MDirectlyMinMfrontMofMtheMtrailerM-MCORRECTMANSWER-DirectlyMinMfrontMofMtheMtrailer
HowMshouldMyouMtestMtheMtractorMsemiMtrailerMconnectionMforMsecurity?
A.MPullMgentlyMforwardMinMlowMgearMagainstMtheMlockedMtrailerMbrakes,MthenMlookMatMitMcarefully
B.MPutMtheMtractorMinMgearMandMpullMaheadMwithMaMsharpMjerk
C.MRockMtheMtrailerMbackMandMforthMwithMtheMtrailerMbrakesMlockedM-MCORRECTMANSWER-
PullMgentlyMforwardMinMlowMgearMagainstMtheMlockedMtrailerMbrakes,MthenMlookMatMitMcarefully
WhenMshouldMyouMuseMtheMhandMvalveMtoMparkMaMcombinationMvehicle?
A.MToMparkMatMloadingMdocks
B.MNever
C.MToMparkMonMaMgradeM-MCORRECTMANSWER-Never
YouMsupplyMairMtoMtheMtrailerMtanksMby:
A.MPushingMinMtheMtrailerMairMsupplyMvalve
B.MPullingMoutMtheMtrailerMairMsupplyMvalve
C.MConnectingMtheMserviceMlineMgladMhandM-MCORRECTMANSWER-
PushingMinMtheMtrailerMairMsupplyMvalve
WhyMshouldMyouMbeMsureMthatMtheMfifthMwheelMplatMisMgreasedMasMrequired?
A.MToMreduceMheatMandMnoise
B.MToMpreventMsteeringMproblems
C.MToMensureMgoodMelectricalMconnectionsM-MCORRECTMANSWER-ToMpreventMsteeringMproblems
QUESTIONS WITH CORRECT ANSWERS 2025
YouMareMcouplingMaMsemiMtrailerMtoMyourMtractorMbutMhaveMnotMyetMbackedMunder.MTheMtrailerMisM
atMtheMrightMheightMwhen:
A.MItMwillMbeMraisedMslightlyMwhenMtheMtractorMisMbackedMunderMit
B.MTheMkingpinMisMaboutM1M1/4MinchesMaboveMtheMfifthMwheel
C.MTheMendMofMtheMkingpinMisMevenMwithMtheMtipMofMtheMfifthMwheelM-MCORRECTMANSWER-
ItMwillMbeMraisedMslightlyMwhenMtheMtractorMisMbackedMunderMit
YouMshouldMnotMbackMaMtractorMunderMaMtrailerMuntilMtheMwholeMairMsystemMis:
A.MBetweenM60MandM80Mpsi
B.MAtMnormalMpressure
C.MBledMdownMtoMhalfMtheMmaximumMpressureM-MCORRECTMANSWER-AtMnormalMpressure
WhichMpartMofMtheMkingpinMshouldMtheMlockingMjawsMcloseMaround?
A.MTheMbase
B.MTheMshank
C.MTheMheadM-MCORRECTMANSWER-TheMshank
WhenMyouMgetMreadyMtoMbackMunderMtheMsemiMtrailerMyouMshouldMlineMup:
A.MAboutM12MdegreesMoffMtheMlineMofMtheMtrailer
B.MTheMkingpinMtoMengageMtheMdriver'sMsideMlockingMjawMfirst
, C.MDirectlyMinMfrontMofMtheMtrailerM-MCORRECTMANSWER-DirectlyMinMfrontMofMtheMtrailer
HowMshouldMyouMtestMtheMtractorMsemiMtrailerMconnectionMforMsecurity?
A.MPullMgentlyMforwardMinMlowMgearMagainstMtheMlockedMtrailerMbrakes,MthenMlookMatMitMcarefully
B.MPutMtheMtractorMinMgearMandMpullMaheadMwithMaMsharpMjerk
C.MRockMtheMtrailerMbackMandMforthMwithMtheMtrailerMbrakesMlockedM-MCORRECTMANSWER-
PullMgentlyMforwardMinMlowMgearMagainstMtheMlockedMtrailerMbrakes,MthenMlookMatMitMcarefully
WhenMshouldMyouMuseMtheMhandMvalveMtoMparkMaMcombinationMvehicle?
A.MToMparkMatMloadingMdocks
B.MNever
C.MToMparkMonMaMgradeM-MCORRECTMANSWER-Never
YouMsupplyMairMtoMtheMtrailerMtanksMby:
A.MPushingMinMtheMtrailerMairMsupplyMvalve
B.MPullingMoutMtheMtrailerMairMsupplyMvalve
C.MConnectingMtheMserviceMlineMgladMhandM-MCORRECTMANSWER-
PushingMinMtheMtrailerMairMsupplyMvalve
WhyMshouldMyouMbeMsureMthatMtheMfifthMwheelMplatMisMgreasedMasMrequired?
A.MToMreduceMheatMandMnoise
B.MToMpreventMsteeringMproblems
C.MToMensureMgoodMelectricalMconnectionsM-MCORRECTMANSWER-ToMpreventMsteeringMproblems